Search for a Dark Photon and an Invisible Dark Higgs Boson in μ+μ- and Missing Energy Final States with the Belle II Experiment

Belle II Collaboration

doi:10.1103/PhysRevLett.130.071804

Search for a Dark Photon and an Invisible Dark Higgs Boson in μ+μ- and Missing Energy Final States with the Belle II Experiment

Belle II Collaboration

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

The dark photon A′ and the dark Higgs boson h′ are hypothetical particles predicted in many dark sector models. We search for the simultaneous production of A′ and h′ in the dark Higgsstrahlung process e+e-→A′h′ with A′→μ+μ- and h′ invisible in electron-positron collisions at a center-of-mass energy of 10.58 GeV in data collected by the Belle II experiment in 2019. With an integrated luminosity of 8.34 fb-1, we observe no evidence for signal. We obtain exclusion limits at 90% Bayesian credibility in the range of 1.7-5.0 fb on the cross section and in the range of 1.7×10-8-200×10-8 on the effective coupling µ2×αD for the A′ mass in the range of 4.0 GeV/c2<MA′<9.7 GeV/c2 and for the h′ mass Mh′<MA′, where µ is the mixing strength between the standard model and the dark photon and αD is the coupling of the dark photon to the dark Higgs boson. Our limits are the first in this mass range.

Original language	English
Article number	071804
Journal	Physical Review Letters
Volume	130
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.130.071804
State	Published - 17 Feb 2023

Funding

Funders	Funder number
National Institute of Informatics and Science Information NETwork 5
Ministry of Education
Istituto Nazionale di Fisica Nucleare and Research Grants BELLE2
Narodowe Centrum Nauki
Institut National de Physique Nucléaire et de Physique des Particules
Korea Research Environment Open Network
Akademi Sains Malaysia
Universiti Malaya
Korea Institute of Science and Technology Information
Bundesministerium für Bildung, Wissenschaft und Forschung
Thailand Center of Excellence in Physics
Department of Science and Technology, Ministry of Science and Technology, India
Centre National de la Recherche Scientifique
Max-Planck-Gesellschaft
Bundesministerium für Bildung und Forschung
Ministry of Education and Science of Ukraine
Helmholtz-Gemeinschaft
Deutsche Forschungsgemeinschaft
CAS Center for Excellence in Particle Physics
Natural Sciences and Engineering Research Council of Canada
TUBITAK ULAKBIM
National Research University Higher School of Economics
Compute Canada
Ministry of Science and Higher Education of the Russian Federation
Ministerstwo Edukacji i Nauki
GLORIAD
Horizon 2020 ERC-Consolidator
Alexander von Humboldt-Stiftung
Ministry of Education, Culture, Sports, Science and Technology
Generalitat Valenciana Spain	CIDEGENT/2018/020
Israel Ministry of Science	3-16543
Ministry of Science Research and Technology	MOST107-2119-M-002-035-MY3, MOST106-2112-M-002-005-MY3
Ministerstvo Školství, Mládeže a Tělovýchovy	LTT17020
Liaoning Revitalization Talents Program	XLYC1807135
Japan Society for the Promotion of Science	18H05226, 18K03621, 16H06492, 26400255, 22H00144, 19H00682, 26220706, 17H01133, 16K05323, 20H05858, 16H03993, 16H03968, 17H05405, 18H03710
Vietnam Academy of Science and Technology	DL0000.05/21-23
Horizon 2020 Marie Sklodowska-Curie	822070
European Commission	267104, 622527
National Science Foundation	PHY-2111604, PHY-1913789, 1913789
Australian Research Council	DP170102204, FT120100745, DP180102629, DP150103061, DE220100462, FT130100018, DP170102389, FT130100303
Science Committee of the Republic of Armenia	20TTCG-1C010
Shanghai Pujiang Program	18PJ1401000
Horizon 2020 Framework Programme	947006, 819127
U.S. Department of Energy and Research	DE-SC0010007, DE-AC06-76RLO1830, DE-SC0010118, DE-SC0010504, DE-SC0012704, DE-SC0010073, DE-SC0011784, DE-SC0021274, DE-SC0022350, DE-SC0019230, DE-SC0009824, DE-SC0007983, DE-SC0009973
National Research Foundation of Korea	2022R1A2C1003993, 2016R1D1A1B02012900, 2018R1A2B3003643, 2018R1D1A1B07047294, 2019R1I1A3A01058933, 2019K1A3A7A09033840, 2021R1A4A2001897, 2018R1A6A1A06024970
Austrian Science Fund	P 31361, J 4625, P 31361-N36
Science and Technology Commission of Shanghai Municipality	19ZR1403000
Israel Science Foundation	2476/17
University of Tabuk Research	S-0280-1439, S-0256-1438
National Natural Science Foundation of China and Research	11521505, 11761141009, 11975076, 11575017, 11675166, 11705209
National Research Foundation of Ukraine	2020.02/0257
Ministry of Higher Education, Malaysia	FOINS-296, CB-236394, CB-180023, CB-254409, CB-221329
Agencia Estatal de Investigación	RYC2020-029875-I
Slovenian Research Agency and Research	J1-9124, P1-0135
Univerzita Karlova v Praze	SVV 260448
United States-Israel Binational Science Foundation	2016113
Grantová Agentura České Republiky	22-18469S
Horizon 2020	700525, 101026516
Horizon 2020 ERC-Advanced	884719
SEP-CINVESTAV	237
European Research Council Seventh Framework	PIEF-GA-2013-622527
Department of Atomic Energy, Government of India	RTI 4002
Chinese Academy of Sciences	QYZDJ-SSW-SLH011

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10.1103/PhysRevLett.130.071804

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title = "Search for a Dark Photon and an Invisible Dark Higgs Boson in μ+μ- and Missing Energy Final States with the Belle II Experiment",

abstract = "The dark photon A′ and the dark Higgs boson h′ are hypothetical particles predicted in many dark sector models. We search for the simultaneous production of A′ and h′ in the dark Higgsstrahlung process e+e-→A′h′ with A′→μ+μ- and h′ invisible in electron-positron collisions at a center-of-mass energy of 10.58 GeV in data collected by the Belle II experiment in 2019. With an integrated luminosity of 8.34 fb-1, we observe no evidence for signal. We obtain exclusion limits at 90\% Bayesian credibility in the range of 1.7-5.0 fb on the cross section and in the range of 1.7{\texttimes}10-8-200{\texttimes}10-8 on the effective coupling µ2{\texttimes}αD for the A′ mass in the range of 4.0 GeV/c2",

author = "\{Belle II Collaboration\} and F. Abudin{\'e}n and I. Adachi and L. Aggarwal and H. Aihara and N. Akopov and A. Aloisio and \{Anh Ky\}, N. and Asner, \{D. M.\} and H. Atmacan and T. Aushev and V. Aushev and V. Babu and S. Bahinipati and P. Bambade and Sw Banerjee and S. Bansal and J. Baudot and A. Baur and A. Beaubien and J. Becker and Behera, \{P. K.\} and Bennett, \{J. V.\} and E. Bernieri and Bernlochner, \{F. U.\} and M. Bertemes and E. Bertholet and M. Bessner and B. Bhuyan and F. Bianchi and T. Bilka and D. Biswas and A. Bobrov and D. Bodrov and A. Bolz and A. Bozek and M. Bra{\v c}ko and P. Branchini and Browder, \{T. E.\} and A. Budano and S. Bussino and M. Campajola and G. Casarosa and C. Cecchi and V. Chekelian and C. Chen and Chen, \{Y. Q.\} and Cheon, \{B. G.\} and S. Dey and M. Nayak and A. Soffer",

note = "Publisher Copyright: {\textcopyright} 2023 authors. Published by the American Physical Society.",

year = "2023",

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day = "17",

doi = "10.1103/PhysRevLett.130.071804",

language = "אנגלית",

volume = "130",

journal = "Physical Review Letters",

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T1 - Search for a Dark Photon and an Invisible Dark Higgs Boson in μ+μ- and Missing Energy Final States with the Belle II Experiment

AU - Belle II Collaboration

AU - Abudinén, F.

AU - Adachi, I.

AU - Aggarwal, L.

AU - Aihara, H.

AU - Akopov, N.

AU - Aloisio, A.

AU - Anh Ky, N.

AU - Asner, D. M.

AU - Atmacan, H.

AU - Aushev, T.

AU - Aushev, V.

AU - Babu, V.

AU - Bahinipati, S.

AU - Bambade, P.

AU - Banerjee, Sw

AU - Bansal, S.

AU - Baudot, J.

AU - Baur, A.

AU - Beaubien, A.

AU - Becker, J.

AU - Behera, P. K.

AU - Bennett, J. V.

AU - Bernieri, E.

AU - Bernlochner, F. U.

AU - Bertemes, M.

AU - Bertholet, E.

AU - Bessner, M.

AU - Bhuyan, B.

AU - Bianchi, F.

AU - Bilka, T.

AU - Biswas, D.

AU - Bobrov, A.

AU - Bodrov, D.

AU - Bolz, A.

AU - Bozek, A.

AU - Bračko, M.

AU - Branchini, P.

AU - Browder, T. E.

AU - Budano, A.

AU - Bussino, S.

AU - Campajola, M.

AU - Casarosa, G.

AU - Cecchi, C.

AU - Chekelian, V.

AU - Chen, C.

AU - Chen, Y. Q.

AU - Cheon, B. G.

AU - Dey, S.

AU - Nayak, M.

AU - Soffer, A.

PY - 2023/2/17

Y1 - 2023/2/17

N2 - The dark photon A′ and the dark Higgs boson h′ are hypothetical particles predicted in many dark sector models. We search for the simultaneous production of A′ and h′ in the dark Higgsstrahlung process e+e-→A′h′ with A′→μ+μ- and h′ invisible in electron-positron collisions at a center-of-mass energy of 10.58 GeV in data collected by the Belle II experiment in 2019. With an integrated luminosity of 8.34 fb-1, we observe no evidence for signal. We obtain exclusion limits at 90% Bayesian credibility in the range of 1.7-5.0 fb on the cross section and in the range of 1.7×10-8-200×10-8 on the effective coupling µ2×αD for the A′ mass in the range of 4.0 GeV/c2

AB - The dark photon A′ and the dark Higgs boson h′ are hypothetical particles predicted in many dark sector models. We search for the simultaneous production of A′ and h′ in the dark Higgsstrahlung process e+e-→A′h′ with A′→μ+μ- and h′ invisible in electron-positron collisions at a center-of-mass energy of 10.58 GeV in data collected by the Belle II experiment in 2019. With an integrated luminosity of 8.34 fb-1, we observe no evidence for signal. We obtain exclusion limits at 90% Bayesian credibility in the range of 1.7-5.0 fb on the cross section and in the range of 1.7×10-8-200×10-8 on the effective coupling µ2×αD for the A′ mass in the range of 4.0 GeV/c2

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AN - SCOPUS:85148334075

SN - 0031-9007

VL - 130

JO - Physical Review Letters

JF - Physical Review Letters

IS - 7

M1 - 071804

ER -

Search for a Dark Photon and an Invisible Dark Higgs Boson in μ+μ- and Missing Energy Final States with the Belle II Experiment

Abstract

Funding

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